Properties of the Number 18671

Eighteen Thousand Six Hundred Seventy-One

Basics

Value: 18670 → 18671 → 18672

Parity: odd

Prime: Yes

Previous Prime: 18661

Next Prime: 18679

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 18671

Divisors: 1, 18671

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100011101111

Octal: 44357

Duodecimal: A97B

Hexadecimal: 48ef

Square: 348606241

Square Root: 136.64186766873468

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Primes p whose reciprocal has period (p-1)/10. A56215

Primes which remain prime after one and after two applications of the rotate-and-add operation of A086002. A86003

Number of partitions p of n such that the number of parts is a part and max(p) - min(p) is not a part. A241384

Larger of pairs of emirps (A006567) whose difference with the (smaller) reversal is a triangular number (A000217). A217286

Numerators of the partial sums of the reciprocals of the alternating sum of divisors function (A206369). A379619

Consider two consecutive primes {p,q} such that P=2p+q and Q=2q+p are both prime. The sequence gives primes P. A248482

Emirps p such that (p·q) mod (p+q) is also an emirp, where q is the digit reversal of p. A355651

Emirps p such that 2·p - reverse(p) is also an emirp. A358689

Number of partitions of floor(5n/2)-1 into n nonnegative integers each no more than 5. A1976

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 78 ones. A31846